问题背景
在做zookeeper注册中心配置的时候，出现连接超时，死活调不好
org.apache.zookeeper.ClientCnxn$SessionTimeoutException: Client session timed out, have not heard from server in 18151ms for session id 0x0
at org.apache.zookeeper.ClientCnxn$SendThread.run(ClientCnxn.java:1230) ~[zookeeper-3.6.0.jar:3.6.0]
2022-04-15 23:12:26.481 INFO 14184 --- [ main] org.apache.zookeeper.ZooKeeper : Session: 0x0 closed
2022-04-15 23:12:26.481 INFO 14184 --- [ain-EventThread] org.apache.zookeeper.ClientCnxn : EventThread shut down for session: 0x0
2022-04-15 23:12:26.485 WARN 14184 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'regCenter' defined in class path resource [com/yg/elasticjob/config/ElasticJobConfig.class]: Invocation of init method failed; nested exception is com.dangdang.ddframe.job.reg.exception.RegException: org.apache.zookeeper.KeeperException$OperationTimeoutException: KeeperErrorCode = OperationTimeout
2022-04-15 23:12:26.489 INFO 14184 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2022-04-15 23:12:26.500 INFO 14184 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-04-15 23:12:26.509 ERROR 14184 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'regCenter' defined in class path resource [com/yg/elasticjob/config/ElasticJobConfig.class]: Invocation of init method failed; nested exception is com.dangdang.ddframe.job.reg.exception.RegException: org.apache.zookeeper.KeeperException$OperationTimeoutException: KeeperErrorCode = OperationTimeout
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1796) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:595) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:517) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:323) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:226) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:321) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:893) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:879) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:551) ~[spring-context-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:143) ~[spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:758) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:750) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1237) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) [spring-boot-2.3.1.RELEASE.jar:2.3.1.RELEASE]
at com.yg.elasticjob.ElasticJobApplication.main(ElasticJobApplication.java:10) [classes/:na]
Caused by: com.dangdang.ddframe.job.reg.exception.RegException: org.apache.zookeeper.KeeperException$OperationTimeoutException: KeeperErrorCode = OperationTimeout
at com.dangdang.ddframe.job.reg.exception.RegExceptionHandler.handleException(RegExceptionHandler.java:52) ~[elastic-job-common-core-2.1.5.jar:na]
at com.dangdang.ddframe.job.reg.zookeeper.ZookeeperRegistryCenter.init(ZookeeperRegistryCenter.java:107) ~[elastic-job-common-core-2.1.5.jar:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_221]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_221]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_221]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_221]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod(AbstractAutowireCapableBeanFactory.java:1922) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1864) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1792) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE]
... 17 common frames omitted
Caused by: org.apache.zookeeper.KeeperException$OperationTimeoutException: KeeperErrorCode = OperationTimeout
at com.dangdang.ddframe.job.reg.zookeeper.ZookeeperRegistryCenter.init(ZookeeperRegistryCenter.java:102) ~[elastic-job-common-core-2.1.5.jar:na]
... 24 common frames omitted
Process finished with exit code 1
解决方案
1 关闭防火墙
systemctl stop firewalld
1
2 增加连接时间
@Bean(initMethod = "init")
public ZookeeperRegistryCenter regCenter(@Value("${zkserver}") final String serverList, @Value("${zknamespace}") final String namespace) {
ZookeeperConfiguration zookeeperConfiguration = new ZookeeperConfiguration(serverList, namespace);
zookeeperConfiguration.setSessionTimeoutMilliseconds(10000);
return new ZookeeperRegistryCenter(zookeeperConfiguration);
}
1
2
3
4
5
6
3 其实前面两种方法对我的项目都无效，最后才发现，zookeeper依赖包冲突，有一个依赖包包含了zookeeper，我自己还引入了一个，导致不兼容，所以删除我自己引用的zookeeper的依赖包
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.6.0</version>
</dependency>
